The is a keyboard instrument that uses vibrating air columns to produce sound.

Organs

Explanation:

In the field of music organ is defined as the keyboard instrument which is operated by the feet and hands by the players.

In organ the air pressure produces notes with pipes which are arranged in the series that are organized in the rows which are scale like rows.

It is the oldest and largest extant repertoire in the category of western music.

Therefore an organ is a instrument tat uses vibrating column which produces sound.

prndulum needs thread, weight clock to time swings

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//